Features notched hammer and ambidextrous safety.
Want to upgrade an old AR-15 with modern performance? The Sporter Lower Parts Kit from Gun Nuts does just that.
This LPK features a notched hammer for compatibility with unshrounded bolt carrier groups found in old Colt, Bushmaster, and surplus uppers, while also providing precision-machined components with an ambidextrous safety for left-handed shooters.
Sporter Lower Parts Kit: What's Included
- Hammer
- Pistol Grip
- Trigger
- Pivot Pin
- Pivot Pin Detent
- Pivot Pin Detent Spring
- Takedown Pin
- Takedown Pin Detent
- Takedown Pin Detent Spring
- Bolt Catch
- Bolt Catch Plunger
- Bolt Catch Roll Pin
- Bolt Catch Spring
- Buffer Retainer
- Buffer Retainer Spring
- Hammer Pin
- Hammer Spring
- Trigger Pin
- Trigger Spring
- Disconnect
- Disconnect Spring
- Magazine Catch
- Magazine Catch Spring
- Magazine Release Button
- Trigger Guard
- Trigger Guard Roll Pin
- Ambi Safety Selector
- Selector Detent
- Selector Detent Spring
- Pistol Grip Lock Washer
- Pistol Grip Screw
Installation Instructions
Follow our step-by-step instructions to install your Sporter Lower Parts Kit!
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